Malicious PDF — malware analysis report

Static analysis result for SHA-256 dded17ec8d0576bd…

MALICIOUS

PDF

87.4 KB Created: 2021-03-11 20:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8757b96b94b5b674d7833d087dc0d093 SHA-1: 94df729c466459da2ef088ad6005155bab1b8de7 SHA-256: dded17ec8d0576bdb567e03bd5a755217b42e318387d9025d8ee3dd276fc906f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://nipisod.ru/123?utm_term=foil+method+worksheet+with+answers, is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'worksheet with answers', consistent with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/123?utm_term=foil+method+worksheet+with+answers
    • https://cdn.sqhk.co/xuzalolotagi/hNu2Vs4/bugsy_malone_actors_now.pdf
    • http://healthbeauty24.online/63234987122ow0vb.pdf
    • http://xukosususif.medianewsonline.com/vumimexakuzagin.pdf
    • http://gejesixave.scienceontheweb.net/85819182020.pdf
    • http://flowerport.store/siwokojebiwu3f4d9.pdf
    • http://suzofovolavuk.scienceontheweb.net/gerimobixiluduru.pdf
    • http://rixorevu.getenjoyment.net/48676254077.pdf
    • http://babbieshop.ru/47985458274486j5.pdf
    • https://cdn.sqhk.co/duwenaxiseve/jdggjdy/monument_valley_az_campgrounds.pdf
    • http://mumijivamivaxij.medianewsonline.com/what_happens_in_a_police_interrogation.pdf
    • http://gravkamen.ru/zavumaxezekezim2grsn.pdf
    • http://dakisemakegag.sportsontheweb.net/mekilazosewefelov.pdf
    • http://lighterusb24.site/baby_yoda_memes_funnyg33sw.pdf
    • http://wumomotetidofe.getenjoyment.net/lefez.pdf
    • http://paselon.getenjoyment.net/89625628446.pdf
    • http://xariketixagat.mypressonline.com/jukatuwumisefi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://muzulozak.atwebpages.com/24200458893.pdf
    • http://kubowulurarekij.myartsonline.com/mopurerikodipemalanuxadew.pdf
    • https://uploads.strikinglycdn.com/files/3f21e784-66f7-4647-8cd5-3d67cc672654/how_much_should_a_lawn_mower_repair_cost.pdf
    • https://uploads.strikinglycdn.com/files/82381fd2-2b07-42fb-a911-b759d388116a/tavimulodefu.pdf
    • http://jisunopesaluzi.atwebpages.com/bohemian_rhapsody_piano_sheet_numbers.pdf
    • http://sulorowanutabu.atwebpages.com/gamemaker_studio_2_mobile_games.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf8.bin
ef890ce2c903991bcecbbd0c86fd8d6d5cf9a19fa61f9b867fc36f1e4a66145a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 4964 bytes
font_01_sfnt_off00011db2.bin
3f36665d961a540d0e054abbf27c5f791d5b80ccc4276740d061a5d598f8c4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 10852 bytes
font_02_sfnt_off0001425e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1425E 4324 bytes

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